body{
    background: url("../images/login.jpg");

    animation-name:bg;
    animation-duration:20s;
    /*变换时间*/
    animation-delay:2s;
    /*动画开始时间*/
    animation-iteration-count:infinite;
    /*下一周期循环播放*/
    animation-play-state:running;
    /*动画开始运行*/
}
@keyframes bg
{
    0%   {background:url("../images/login2.jpg");}
    34%  {background:url("../images/login3.jpg");}
    67%  {background:url("../images/login4.jpg");}
    100% {background:url("../images/login.jpg");}
}
.form{background: rgba(255,255,255,0.7);width:400px;margin:120px auto;}

/*阴影*/

/*.fa{display: inline-block;top: 2px;left: 6px;position: relative;color: #ccc;}*/
/*input[type="text"],input[type="password"]{padding-left:26px;}*/
/*.checkbox{padding-left:21px;}*/
